OOKB - Olaf's Own Knowledge Base - linux

aptoffline

Anonymous (anonymous@undisclosed.example.com) — 2023-02-12T17:16:17+00:00

Create a repository to update an offline system When running a Debian system (Debian, Ubuntu, Cumulus, ...) without internet connection, it cannot receive upgrades with apt update && apt upgrade -y But with any Debian based system that is online, it is possible to download the required packages and dependencies (!).

certbot

Anonymous (anonymous@undisclosed.example.com) — 2023-10-25T05:02:50+00:00

Configuration file for certbot /etc/letsencrypt/cli.ini The line post-hook in this file determines what certbot is doing after renewing a certificate: post-hook = systemctl reload postfix ; systemctl reload dovecot ; systemctl restart apache2 It should trigger postfix and dovecot to reload and restart apache.

dd

Anonymous (anonymous@undisclosed.example.com) — 2023-02-05T18:12:50+00:00

Clone a drive with dd and show progress dd if= of= bs=4M conv=noerror,sync The bs (block size) of 4MB works well with two SSD's. The use of conv=noerror,sync is rather disputable: noerror will continue ignoring errors and sync will fill the blocks - I think I use conv forever and it lost it's value with modern drives - I think it doesn't hurt

desktopicons

Anonymous (anonymous@undisclosed.example.com) — 2023-02-05T13:46:32+00:00

Create System Icons on the (KDE) Plasma Desktop ---------- I like to have the system icons, like trash, my computer, home and network on the desktop. There's no system configuration that simply switches them on - I guess the developers have another taste .. But, it's easy to do: just create a simple text file for each in $home\Desktop

disable_kwallet

Anonymous (anonymous@undisclosed.example.com) — 2023-01-25T22:11:56+00:00

Disable kWallet Under Plasma, when closing a KVM VM (and most likely at other occasions too) kWallet might ask to provide your credentials - even though you never initialized kWallet. In the dialog that opens, just remove the check mark from “Enable the KDE wallet subsystem

linux

Anonymous (anonymous@undisclosed.example.com) — 2023-05-13T15:37:35+00:00

Linux I am using mainly Debian. Snippets - simple things I often forget Mirror a complete repository on own server Rustdesk Server

opensslchain

Anonymous (anonymous@undisclosed.example.com) — 2023-02-08T01:00:30+00:00

Display certificates contained in a certificate file A certificate file might contain just one certificate or multiple certificates (the whole certification chain for example). Display the first (or only) certificate in a certificate file openssl x509 -noout -text -in

repomirror

Anonymous (anonymous@undisclosed.example.com) — 2023-03-04T09:21:43+00:00

Mirror a repository When running a Debian system (Debian, Ubuntu, Cumulus, ...) without internet connection, it cannot receive upgrades with apt update && apt upgrade -y But with any Debian based system that is online, it is possible to download the required packages and dependencies (!). With only a very few systems at the same patchlevel, it might be quicker to just download the required packages as in

rhel8alias

Anonymous (anonymous@undisclosed.example.com) — 2023-11-04T11:16:23+00:00

Alias definitions for all users in RHEL 8 Some settings are interesting for every user. In RHEL 8 aliases (like ll=ls -l) are defined in files in /etc/profile.d. The alias for ll for bash is defined in /etc/profile.d/colorls.sh

rheloffline

Anonymous (anonymous@undisclosed.example.com) — 2023-12-06T07:43:33+00:00

Create a repository to update an offline Red Hat Enterprise Linux system When running a RHEL server without internet connection, it cannot receive upgrades. But with a RHEL system with the same major release that is online, it is possible to download the required packages and dependencies.

rustdesk

Anonymous (anonymous@undisclosed.example.com) — 2024-02-06T18:32:58+00:00

Install Rustdesk Server on Debian Download the deb packages Go to the github site of the project and copy the links for the hbbs and hbbr server. For version 1.1.10-3 that would be and . On the Debian Linux server download the packages: wget https://github.com/rustd…

sftp

Anonymous (anonymous@undisclosed.example.com) — 2023-10-31T11:19:10+00:00

Configure a SFTP only user When somebody needs to transfer files to a server, it is often not desirable that that user has more privileges than minimal required for this task. Often, this is actually an automated process between two well know servers.

snippets

Anonymous (anonymous@undisclosed.example.com) — 2023-12-06T07:23:33+00:00

Snippets This page contains command syntax and short scripts for things I often forget how to ... clone a drive with dd and show progress Correct time difference between Ubuntu and Windows on multi boot systems Disable kWallet on the Plasma desktop Display all certificates contained in a PEM file (full chain) Enable System Icons (home, Trash, My Computer, Network) on the Plasma desktop KVM/ QEMU Extend a virtual disk KVM/ QEMU mount host directory in VM Repository for offline systems …

xp12

Anonymous (anonymous@undisclosed.example.com) — 2024-01-19T00:14:49+00:00

X-Plane 12 under Debian Linux At least since the implementation of ZINK (an OpenGL bridge to Vulkan) in XP12 the performance of XP12 is amazing under Linux. Here I will list solutions to issues I had when I installed XP12 under Debian Bookworm (12).